Originally presented as the author's thesis (Ph. D.)--Columbia University. / Includes bibliographical references (p. 559-561).
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/316251920 |
| Date | January 1950 |
| Creators | Williams, Ernest E. |
| Publisher | New York : American Museum of Natural History, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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